448         let mut buf = String::new();  in disassemble()  localVariable
468             writeln!(buf, "block{n}: ; offset 0x{start:x}")?;  in disassemble()
473                 write!(buf, "  ")?;  in disassemble()
477                     write!(buf, "{s}")?;  in disassemble()
479                         write!(buf, " ")?;  in disassemble()
483                 write!(buf, "{op_str}")?;  in disassemble()
490                         buf,  in disassemble()
499                     write!(buf, " ; trap: {}", trap.code)?;  in disassemble()
506                         buf,  in disassemble()
513                 writeln!(buf)?;  in disassemble()
517         return Ok(buf);  in disassemble()